1983 Ford F250 6.9 Diesel Glow Plug Relay Manual Bypass

Wire a momentary switch to control power to glow plugs manually.

[pinecraftloghomes]

I have been chasing down a relay problem with my 84 f350. I bought it from an old timer who did the same thing before I bought it. I always thought it was odd that I had to manually push a glow plug button, but now I know why it is the way it is. This video made my day. Thank you.

[Nighthawkinlight]

Rock on, thanks for the video. Just what I was looking for.

[matwalker]

Other than the fact the glow plugs are not meant to run on 12 volts but actually 11 your system works. Bye-by-passing that great big resistor on the original relay solenoid you're giving them full voltage and thus 8 seconds is enough although right on the glow plug package it will tell you they are 10-second glow plugs. If a system like this will work for you for 10 years it's because you don't use it very often. If you glow that system like the original relay did every time you touch the truck you'd burn those glow plugs out in no time.. good vid thanks for posting

[socaldiesel]

This is a must do! I have a 87' 6.9, manually working that glowplug issue is a benefit for sure.

[lenBrill]

My 1983 6.9 was wired to skip the controller and a push and hold button was implemented.
All my brand new glow plugs burned out in one week

[pdetterman]

Sir, fantastic video. Best explanation/tutorial I have seen, and I've been looking around all week.

[MrDukstr]

Getting ready to do my dad’s old 83 F350 with the 6.9.

[davidhiney]

The mechanic broke off the controller and connected the new one and just left it lay there and never installed the new glow plugs I had provided, and charged $180. Well he also changed one heater hose, maybe took 5 minutes. So rather then try to extract the broken piece from the back of the engine I did what this gentleman did. It works great....

[renj]

Did the same thing on my 90 back in 2005 and they still work 15 years later. According to the maintenance log they were replaced in 95 then 1998 I had to replace them then finally after studying the diagram I did exactly this, because my theory is that the relay let's them get stuck on and this kills the life of them.

[deepbludude]

Same here excellent up load gonna do that to my 7.3idi, do a tutorial on your push button start haha...

[watchmanj]

THANKS I've had the same set up on 1986 6.9 - trying to replace the selenoid but the posts on the new one, not sure where to hook up which wire. My mechanic put the 7.3 glow plugs in that are SELF LIMITING cause I was burning out the 6.9 ones. :)

[ronanrogers]

Nice. I’m going to do this to my Mitsubishi 2.8 turbo indirect diesel (Delica Space Wagon) because they can be hard to start in cold weather

[marcusochoa]

Please please help did as you said and was simple but the wire for my injection pump that turns it on burnt up on me

[cubey]

I have a 1985 E350 motorhome with the 6.9. It might still have the original glow plugs, for all I know. It still runs on the controller and starts pretty well most of the time. Unless I park nose up hill, then it gets air intrusion somewhere. But glow plug wise it's fine still.

[mcwaterson]

The glow plug relay thats bypassed has a live in from the battery, a live out to the buzz bar for the glowplugs and a switch wire which when turned on its lets the power pass through the relay to the buzzbar.

Yes it is easy to put a switch on but its not the correct way to go in my opinion. The way it generally works is your coolant sensor detects if the car is cold or hot, if its cold the sensor activates a wire to the glow plug ecu control until to tell it this, the ecu then activates a wire to the glow plug relay to tell it to turn on, the glow plugs remain on for a short time until the engine realises that the engine is running correctly, by this i mean that the engines fuel is burning hot enough to run without the plugs at which point it then deactivates the switch wire via the ECU which turns off the relay itself.

If you get back in the car when the engine is warm, the coolant sensor circuit will be closed and the ecu will not activate the glow plugs as they aren’t needed. I’m all for doing hacks like this if im in a jam but i enjoy finding the underlying fault way better 😝 buy a multimeter and some wire wool for cleaning those connections! 🤣

[zip]

have you a solution for the dangling fuse box? Mine is same, but bad back, hard to get under there to mess with it.

[commanderdan]

I'm having an issue with my glow plugs. It's a brand new manual glow plug controller and brand new glowplugs. I can hear the controller click whenever I press the button, but for some reason, power isn't getting to my glowplugs. As far as I can tell, my wiring harness is good. Perhaps I should redo my harness? I'll be checking it with a multimeter tomorrow.

[DrBear-bnkq]

I am kind of confused on the mechanics so that yellow wire does it complete a full circuit? or what happens? because i want to do this manually so i am wondering if all i have to do is connect a wire to the same spot that yellow wire is and then connect it to a button... am i missing something or are those the steps.

[UbrNbr]

So I’m having trouble, that small post wire that’s red and has a black quick connect cap on it opposite of the small post yellow wire in your video, for me every time I turn the ignition switch over it instantly melts that wire on opposite the yellow one in your video( small red as I described) any idea what’s the issue?

[michaelcook]

Can you tell me how you wire both glow plug and starter button